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arXiv 0907.2056cond-mat.str-el
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无自旋Falicov-Kimball模型电荷密度波相的电子喇曼散射

Total electronic Raman scattering in the charge-density-wave phase of the spinless Falicov-Kimball model

O. P. Matveev, A. M. Shvaika, J. K. Freericks

摘要:

在动力学平均场论的框架下,计算了无自旋Falicov-Kimball模型在半填充时的电荷密度波(CDW)相的电子喇曼散射谱,包括非共振、混合和共振分量.它的频率依赖性的入射光子的能量的不同值进行了研究。光谱反映了态密度的不同结构以及它们如何通过屏蔽和共振效应进行修改。对$B_{\rm 1g}$、$B_{\rm 2g}$和$A_{\rm 1g}$对称性(通常在实验中检查)进行计算。我们的拉曼光谱的共振效应的结果,发现通过调整入射光子的能量,给信息的CDW有序相的多体电荷动力学。

英文摘要:

The total electronic Raman scattering spectrum, including the nonresonant, mixed and resonant components, is determined for the charge-density-wave (CDW) phase of the spinless Falicov-Kimball model at half filling within dynamical mean-field theory. Its frequency dependence is investigated for different values of the energy of the incident photons. The spectra reflect the different structures in the density of states and how they are modified by screening and resonance effects. The calculations are performed for the $B_{\rm 1g}$, $B_{\rm 2g}$ and $A_{\rm 1g}$ symmetries (which are typically examined in experiment). Our results for the resonance effects of the Raman spectra, found by tuning the energy of the incident photons, give information about the many-body charge dynamics of the CDW-ordered phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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